free fields to use in serviceorder

In the serviceorders the user was able to put some additional information in the field ILOA-EQFNR the sort field

now we want to use the sort field in the equipment so I was looking which field I could use where a user can enter a short description since the sort field is overwritten by the value of the sort field from the equipment ?

does anybody know which fields are save to use and can be activated on the screen of iw32 and has a length of minimal 30 characters ?

kind regards

arthur